Police in Los Angeles are clearing out a downtown protest encampment in the latest in a series of raids on Occupy Wall Street-related sites nationwide. More than 1,000 police officers in riot gear descended on the encampment around Los Angeles City Hall shortly after midnight. Scores of people were arrested as police tore down the tents around the site. Meanwhile, in Philadelphia, around 100 protesters vacated their encampment earlier today after police moved in and warned them of mass arrests.